Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. organic material

Narrower term/s

• dry ice
• liquid carbon dioxide

Anotations

Scope note:

Colorless gas (CO2) with a sharp odor; it is a minor component in the earth's atmosphere, does not support combustion, dissolves in water to form carbonic acid, is formed in animal respiration and in the decay or combustion of animal and vegetable matter, and is absorbed from the air by plants in photosynthesis. Carbon dioxide is used as a refrigerant and is found in carbonated beverages and fire extinguishers, among other uses.